Improvement in compound reciprocating engines



H. BERTIEAUX.

Improvement in Compound Reciprocating Engines.

N0. 123L857. V faten ted Feb. 20,1872.

Wi'ikzeda 6d I flyeraavrv 7% 4 zjm/zm dgf UNITED STATES PATENT OFFICE,

HENRI BERTIEAUX, OF ANTVVEBP, BELGIUM.

IMPROVEMENT'IN COMPOUND RECIPROCATING ENGINES.

Specification forming part of Letters Patent No. 123,857, dated February20, 1872.

SPECIFICATION.

I, HENRI BERTIEAUX, of the city of Ant werp, in the Kingdom of Belgium,have invented a certain Improvement in Steam Cylinders for CompoundEngines, of which the following is a specification:

My invention consists in the construction and arrangement of a compoundengine, by which the high and low-pressure cylinders are cast in onepiece with the valve-seats.

The drawing represents a longitudinal section of my improvedsteam-cylinders for compound engines.

Iln the drawing, A represents a high and B a low-pressure cylinder, casttogether, and each provided with a separate valve-seat. Onto thevalve-seats are securely fastened or bolted the steam-chests a and b, inwhich are placed the valves 0 and D, connected by a common valve-stem,E, by which the ports entering the respective cylinders are opened andclosed. Suitable stuffing-boxes are arranged in the cylinder-heads andat each end of the steamchest.

The high-pressure steam enters at F in the steam-chest a, and as itopens the steam-port therein steam enters the highpressure cylinder A,and as it is exhausted it passes along the side-pipe G and enters thesteam-chest b with its valve, which admits it to the lowpressurecylinder B, from which it may be exhausted into the air or thecondenser, as described.

The great advantage of my improvement consists in its simplicity andmoderate cost, as the separate inner cylinder-heads are done away withentirely, saving the extra expense of turning, fitting, and bolting;and, also, the

